{"id":840,"date":"2010-11-04T01:08:00","date_gmt":"2010-11-03T18:08:00","guid":{"rendered":"http:\/\/it4bus.vn\/itersdesktop\/2010\/11\/04\/asp-net-drop-down-list-control\/"},"modified":"2014-01-03T05:05:47","modified_gmt":"2014-01-02T22:05:47","slug":"asp-net-drop-down-list-control","status":"publish","type":"post","link":"https:\/\/www.itersdesktop.com\/fr\/2010\/11\/04\/asp-net-drop-down-list-control\/","title":{"rendered":"ASP.NET: Drop Down List Control"},"content":{"rendered":"<p>Th\u01b0\u1eddng th\u01b0\u1eddng ch\u00fang ta mu\u1ed1n \u0111i\u1ec1n d\u1eef li\u1ec7u cho c\u00e1c h\u1ed9p danh s\u00e1ch (drop down list) khi form v\u1eeba n\u1ea1p (m\u00f4i tr\u01b0\u1eddng web v\u00e0 desktop). R\u00f5 r\u00e0ng ch\u00fang ta ch\u1ec9 mu\u1ed1n n\u1ea1p (fill in) m\u1ed9t l\u1ea7n duy nh\u1ea5t khi form v\u1eeba kh\u1edfi \u0111\u1ed9ng, v\u00e0 kh\u00f4ng c\u1ea7n fill n\u1eefa trong tr\u01b0\u1eddng h\u1ee3p form refresh. \u0110o \u0111\u00f3, \u0111\u1ec3 tr\u00e1nh t\u00ecnh tr\u1ea1ng c\u1ee9 n\u1ea1p nhi\u1ec1u l\u1ea7n m\u1ed7i khi form h\u1edfi \u0111\u1ed9ng, ch\u00fang ta \u0111\u1eb7t \u0111o\u1ea1n m\u00e3 n\u1ea1p d\u1eef li\u1ec7u cho \u00f4 \u0111i\u1ec1u khi\u1ec3n Drop Down List trong \u0111i\u1ec1u ki\u1ec7n trang ch\u01b0a PostBack. C\u00e1ch l\u00e0m nh\u01b0 sau:<\/p>\n<blockquote><p>if (!Page.IsPostBack) {<\/p><\/blockquote>\n<blockquote><p>&#8230;.; \/\/ \u0110o\u1ea1n m\u00e3 l\u1ec7nh fill in cho drop down list<\/p><\/blockquote>\n<blockquote><p>}<\/p><\/blockquote>\n<p>T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady cho c\u00e1c \u00f4 \u0111i\u1ec1u khi\u1ec3n kh\u00e1c nh\u01b0 ListBox,<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Th\u01b0\u1eddng th\u01b0\u1eddng ch\u00fang ta mu\u1ed1n \u0111i\u1ec1n d\u1eef li\u1ec7u cho c\u00e1c h\u1ed9p danh s\u00e1ch (drop down list) khi form v\u1eeba n\u1ea1p (m\u00f4i tr\u01b0\u1eddng web v\u00e0 desktop). R\u00f5 r\u00e0ng ch\u00fang ta ch\u1ec9&hellip; <\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[242,243],"tags":[375],"class_list":["post-840","post","type-post","status-publish","format-standard","hentry","category-asp-net","category-ephy10","tag-drop-down-list-control"],"_links":{"self":[{"href":"https:\/\/www.itersdesktop.com\/fr\/wp-json\/wp\/v2\/posts\/840","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.itersdesktop.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.itersdesktop.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.itersdesktop.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.itersdesktop.com\/fr\/wp-json\/wp\/v2\/comments?post=840"}],"version-history":[{"count":1,"href":"https:\/\/www.itersdesktop.com\/fr\/wp-json\/wp\/v2\/posts\/840\/revisions"}],"predecessor-version":[{"id":1107,"href":"https:\/\/www.itersdesktop.com\/fr\/wp-json\/wp\/v2\/posts\/840\/revisions\/1107"}],"wp:attachment":[{"href":"https:\/\/www.itersdesktop.com\/fr\/wp-json\/wp\/v2\/media?parent=840"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.itersdesktop.com\/fr\/wp-json\/wp\/v2\/categories?post=840"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.itersdesktop.com\/fr\/wp-json\/wp\/v2\/tags?post=840"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}